reynolds



A R. REYNOLDS. MACHINE FOR GRINDING METAL PLATES.

No. 62,566. v Patented Mar. 5, 1867;

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ASA R. REYNOLDS. OF AUBURN. NEW YORK.

Letters" Patent No. 62,56G, dated 'ZlIarcIrS, 1867.

IMPROVEMENT I-N MACHINES FOR GRINDING METAL PLATES.

on fitlgchuile return it in ilgtSt fitters 33mm no waiting not of ilt $211119.

TO ALL WHOM IT MAY. CONCERN:

Be it known that L Asii R. Burrows, of Auburn, inthe county of Cayuga, end State of New York, have invented certtiin new and useful Improvements in Machines for Face Grinding; and that the following is a full, clear, and'exact description of the same, reference being had to the accompanying drawings, melting a part of this specification, in which Figurel represents a vertical section throughthe machine; and

Figure 2 represents a top'plan with the grindingstone removed to show the parts underneath it.

Similar letters of reference where they occur. in the separate figures denote like parts of the machine in both of the drawings. I v

In grinding machines for facing ofi' pieces of steel, such, for instance, as knife sections for harvesting machines, or plane irons, or any other article requiring true and accurate sides and edges, Itind that when, constructed as at present in general use, the part of the steel or'platc that comes first in contact with the stone is invariably rounded off and not a perfectly fiat surface. This is due, as I believe, to the ploy of the journals of the grinding-stone and the yielding of'thc bed, and probably of othcr 'parts of the machine without any compensation or provisionior such play and yielding or counteracting influence. The object of my invention is to avoid this rounding oil of the edge ofthe plate that first strikes or comes in contuct with the grinding stone. And my invention consists in melting the ways on which the bed moves, that holds and feeds up the article that is to be ground, concave, so that the bed may conform thereto under any undue pressure or sudden contact between the article and the stone.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same'with reference to the drawings.

A is in base or bed, on which two upright pieces, B B, rise to support the grinding-stone C. In the uprights B, and on the-bed A, which may be called the frame, is supported an adjustable bed-piece, D, having' at one end journals, 'a a, which will enter and be supported in any of the recesses or bearings Zr, on theinsides of the frame-pieces B, the other end of said bed being adjusted and held by u. set-screw, c. On the top cf this bed piece D, are ways, cc, which nro made concave, as seen in the section, fig. 1, and upon these concave ways the. feeding-bed E moves. The feeding-bed E may be run up to or under the stone C, by means of :1- pinion, cl; (which may be turned by hand-levers taking into the ruck g attached to sold feeding-bed. The article to be .faced emny be plolccd immediately upon this feeding-bed; but, to accomplish another purpose, to be hereafter explained, I prefer to place upon the end of the feeding-bed E, anotherbed, F, which rests upon transverse ways on the bed E, so that it may be moved at right angles to the motion of the bed E as well as with the bed. Upon this upper bed F, the sickle section,or plane iron, or other article may be placed and secured,-s0' that it may be moved under the stone and from one side to' the other of the stone. I have shown at z, fig. 1, a. recess margined by ribs or projections, so that n. sickle sect-ion, (triangular in for-nu) may lie in said recess whilst being ground. Any other shaped recess corresponding to the shape of the article to be ground may be used, with ledges or projections to hold it inplucc. The stone 0 runs (as shown by the arrows) against the feed of the article to be ground. The rocky is hinged to the bed E, and to keep it in gear with the pin-ion d it passes under a friction-roll, m, which keeps it from rising. This roll m may be on a turning arm so as to release the rack and bed and allow them to be removed. The object of the lateral traverse of the upper bed F, on the longitudinally moving bed E, is to move the article that is being ground under any part of the stone that is desirable, and to avoid or to avail of the harder or softer spots in the stone. The wearing away of the stone is compensated for by the adjustment of the bed I), by its journals rt, and the bearings b at one of its end, send the set-screw a at the other end, The rounding oif of the edge of the plntethat first comes in contact with the stone, may be due (in machines with straight or level ways for the feeding-bed) to the play of the journals, or yielding'oi the bed or frame, or to the rapid motion of the stone just as it strikes the piece to be ground, or by the suddcnncss of the contact causing the bed to slightly tip, or of all combined. The making of the ways concave avoids the rounding of the edge by yielding or giving way'to the play, yield, concussion, or abrasion, or whatever may be the cause in the level ways. The concavity appears to be. an entire remedy to the evil mentioned, and produces perfectly accurate work.

What I claim, is-

1. Moving a bed that carries 'an article to be faced to a grinding-stone upon concave ways for the purpose of preventing the rounding oflof the edge first brought into contact with the stone, as set forth.

2. I also claim adjusting a. bed at both of itsends to the wear of a. grjndi ng-stone by means of the journals arld bearings a 6 at one end, and set-screw c at the other end, substantially as described. I

ASA R. REYNOLDS.

Witnesses:

FRED. M. TERRILL, W. L Goomucn. 

